Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/11965#discussion_r57488992
--- Diff: mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
---
@@ -400,14 +401,10 @@ private class VectorAttributeRewriter(
val group = AttributeGroup.fromStructField(dataset.schema(vectorCol))
val attrs = group.attributes.get.map { attr =>
if (attr.name.isDefined) {
- val name = attr.name.get
- val replacement = prefixesToRewrite.filter { case (k, _) =>
name.startsWith(k) }
- if (replacement.nonEmpty) {
- val (k, v) = replacement.headOption.get
- attr.withName(v + name.stripPrefix(k))
- } else {
- attr
+ val name = prefixesToRewrite.foldLeft(attr.name.get) { case
(curName, (from, to)) =>
--- End diff --
This change was needed because of multiple prefixes being added (one for
StringIndexer, and one for Interaction)
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